<?php
/**
 * CakeCMS - 通用的树型类，可以生成任何树型结构
 * 功能模块:
 *
 * @author zzdboy
 * @version 1.0
 */
class Tree {
	/**
	 * 生成树型结构所需要的2维数组
	 *
	 * @var array
	 */
	public $arr = array ();
	
	/**
	 * 生成树型结构所需修饰符号，可以换成图片
	 *
	 * @var array
	 */
	public $icon = array (
			'│',
			'├',
			'└' 
	);
	public $nbsp = "&nbsp;";
	
	/**
	 *
	 * @access private
	 */
	public $ret = '';
	
	/**
	 * 构造函数，初始化类
	 *
	 * @param
	 *        	array 2维数组，例如：
	 *        	array(
	 *        	1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),
	 *        	2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),
	 *        	3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),
	 *        	4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),
	 *        	5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),
	 *        	6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),
	 *        	7 => array('id'=>'7','parentid'=>3,'name'=>'三级栏目二')
	 *        	)
	 */
	public function init($arr = array()) {
		$this->arr = $arr;
		$this->ret = '';
		return is_array ( $arr );
	}
	
	/**
	 * 得到父级数组
	 *
	 * @param
	 *        	int
	 * @return array
	 */
	public function get_parent($myid) {
		$newarr = array ();
		if (! isset ( $this->arr [$myid] ))
			return false;
		$pid = $this->arr [$myid] ['parentid'];
		$pid = $this->arr [$pid] ['parentid'];
		if (is_array ( $this->arr )) {
			foreach ( $this->arr as $id => $a ) {
				if ($a ['parentid'] == $pid)
					$newarr [$id] = $a;
			}
		}
		return $newarr;
	}
	
	/**
	 * 得到子级数组
	 *
	 * @param
	 *        	int
	 * @return array
	 */
	public function get_child($myid) {
		$a = $newarr = array ();
		if (is_array ( $this->arr )) {
			foreach ( $this->arr as $id => $a ) {
				if ($a ['parentid'] == $myid)
					$newarr [$id] = $a;
			}
		}
		return $newarr ? $newarr : false;
	}
	
	/**
	 * 得到当前位置数组
	 *
	 * @param
	 *        	int
	 * @return array
	 */
	public function get_pos($myid, &$newarr) {
		$a = array ();
		if (! isset ( $this->arr [$myid] ))
			return false;
		$newarr [] = $this->arr [$myid];
		$pid = $this->arr [$myid] ['parentid'];
		if (isset ( $this->arr [$pid] )) {
			$this->get_pos ( $pid, $newarr );
		}
		if (is_array ( $newarr )) {
			krsort ( $newarr );
			foreach ( $newarr as $v ) {
				$a [$v ['id']] = $v;
			}
		}
		return $a;
	}
	
	/**
	 * 得到树型结构
	 *
	 * @param
	 *        	int ID，表示获得这个ID下的所有子级
	 * @param
	 *        	string 生成树型结构的基本代码，例如："<option value=\$id
	 *        	\$selected>\$spacer\$name</option>"
	 * @param
	 *        	int 被选中的ID，比如在做树型下拉框的时候需要用到
	 * @return string
	 */
	public function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = '') {
		$number = 1;
		$child = $this->get_child ( $myid );
		if (is_array ( $child )) {
			$total = count ( $child );
			foreach ( $child as $id => $value ) {
				$j = $k = '';
				if ($number == $total) {
					$j .= $this->icon [2];
				} else {
					$j .= $this->icon [1];
					$k = $adds ? $this->icon [0] : '';
				}
				$spacer = $adds ? $adds . $j : '';
				$selected = $id == $sid ? 'selected' : '';
				@extract ( $value );
				$parentid == 0 && $str_group ? eval ( "\$nstr = \"$str_group\";" ) : eval ( "\$nstr = \"$str\";" );
				$this->ret .= $nstr;
				$nbsp = $this->nbsp;
				$this->get_tree ( $id, $str, $sid, $adds . $k . $nbsp, $str_group );
				$number ++;
			}
		}
		return $this->ret;
	}
	/**
	 * 同上一方法类似,但允许多选
	 */
	public function get_tree_multi($myid, $str, $sid = 0, $adds = '') {
		$number = 1;
		$child = $this->get_child ( $myid );
		if (is_array ( $child )) {
			$total = count ( $child );
			foreach ( $child as $id => $a ) {
				$j = $k = '';
				if ($number == $total) {
					$j .= $this->icon [2];
				} else {
					$j .= $this->icon [1];
					$k = $adds ? $this->icon [0] : '';
				}
				$spacer = $adds ? $adds . $j : '';
				
				$selected = $this->have ( $sid, $id ) ? 'selected' : '';
				@extract ( $a );
				eval ( "\$nstr = \"$str\";" );
				$this->ret .= $nstr;
				$this->get_tree_multi ( $id, $str, $sid, $adds . $k . '&nbsp;' );
				$number ++;
			}
		}
		return $this->ret;
	}
	/**
	 *
	 * @param integer $myid
	 *        	要查询的ID
	 * @param string $str
	 *        	第一种HTML代码方式
	 * @param string $str2
	 *        	第二种HTML代码方式
	 * @param integer $sid
	 *        	默认选中
	 * @param integer $adds
	 *        	前缀
	 */
	public function get_tree_category($myid, $str, $str2, $sid = 0, $adds = '') {
		$number = 1;
		$child = $this->get_child ( $myid );
		if (is_array ( $child )) {
			$total = count ( $child );
			foreach ( $child as $id => $a ) {
				$j = $k = '';
				if ($number == $total) {
					$j .= $this->icon [2];
				} else {
					$j .= $this->icon [1];
					$k = $adds ? $this->icon [0] : '';
				}
				$spacer = $adds ? $adds . $j : '';
				
				$selected = $this->have ( $sid, $id ) ? 'selected' : '';
				@extract ( $a );
				if (empty ( $html_disabled )) {
					eval ( "\$nstr = \"$str\";" );
				} else {
					eval ( "\$nstr = \"$str2\";" );
				}
				$this->ret .= $nstr;
				$this->get_tree_category ( $id, $str, $str2, $sid, $adds . $k . '&nbsp;' );
				$number ++;
			}
		}
		return $this->ret;
	}
	
	/**
	 * 同上一类方法，jquery treeview 风格，可伸缩样式（需要treeview插件支持）
	 *
	 * @param $myid 表示获得这个ID下的所有子级        	
	 * @param $effected_id 需要生成treeview目录数的id        	
	 * @param $str 末级样式        	
	 * @param $str2 目录级别样式        	
	 * @param $showlevel 直接显示层级数，其余为异步显示，0为全部限制        	
	 * @param $style 目录样式
	 *        	默认 filetree 可增加其他样式如'filetree treeview-famfamfam'
	 * @param $currentlevel 计算当前层级，递归使用
	 *        	适用改函数时不需要用该参数
	 * @param $recursion 递归使用
	 *        	外部调用时为FALSE
	 */
	function get_treeview($myid, $effected_id = 'example', $str = "<span class='file'>\$name</span>", $str2 = "<span class='folder'>\$name</span>", $showlevel = 0, $style = 'filetree ', $currentlevel = 1, $recursion = FALSE) {
		$child = $this->get_child ( $myid );
		if (! defined ( 'EFFECTED_INIT' )) {
			$effected = ' id="' . $effected_id . '"';
			define ( 'EFFECTED_INIT', 1 );
		} else {
			$effected = '';
		}
		$placeholder = '<ul><li><span class="placeholder"></span></li></ul>';
		if (! $recursion)
			$this->str .= '<ul' . $effected . '  class="' . $style . '">';
		foreach ( $child as $id => $a ) {
			
			@extract ( $a );
			if ($showlevel > 0 && $showlevel == $currentlevel && $this->get_child ( $id ))
				$folder = 'hasChildren'; // 如设置显示层级模式@2011.07.01
			$floder_status = isset ( $folder ) ? ' class="' . $folder . '"' : '';
			$this->str .= $recursion ? '<ul><li' . $floder_status . ' id=\'' . $id . '\'>' : '<li' . $floder_status . ' id=\'' . $id . '\'>';
			$recursion = FALSE;
			if ($this->get_child ( $id )) {
				eval ( "\$nstr = \"$str2\";" );
				$this->str .= $nstr;
				if ($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {
					$this->get_treeview ( $id, $effected_id, $str, $str2, $showlevel, $style, $currentlevel + 1, TRUE );
				} elseif ($showlevel > 0 && $showlevel == $currentlevel) {
					$this->str .= $placeholder;
				}
			} else {
				eval ( "\$nstr = \"$str\";" );
				$this->str .= $nstr;
			}
			$this->str .= $recursion ? '</li></ul>' : '</li>';
		}
		if (! $recursion)
			$this->str .= '</ul>';
		return $this->str;
	}
	
	/**
	 * 获取子栏目json
	 *
	 * @param int $myid        	
	 */
	public function creat_sub_json($myid, $str = '') {
		$sub_cats = $this->get_child ( $myid );
		$n = 0;
		if (is_array ( $sub_cats ))
			foreach ( $sub_cats as $c ) {
				$data [$n] ['id'] = iconv ( 'utf-8', 'utf-8', $c ['id'] );
				if ($this->get_child ( $c ['id'] )) {
					$data [$n] ['liclass'] = 'hasChildren';
					$data [$n] ['children'] = array (
							array (
									'text' => '&nbsp;',
									'classes' => 'placeholder' 
							) 
					);
					$data [$n] ['classes'] = 'folder';
					$data [$n] ['text'] = iconv ( 'utf-8', 'utf-8', $c ['catname'] );
				} else {
					if ($str) {
						@extract ( array_iconv ( $c, 'utf-8', 'utf-8' ) );
						eval ( "\$data[$n]['text'] = \"$str\";" );
					} else {
						$data [$n] ['text'] = iconv ( 'utf-8', 'utf-8', $c ['catname'] );
					}
				}
				$n ++;
			}
		return json_encode ( $data );
	}
	private function have($list, $item) {
		return (strpos ( ',,' . $list . ',', ',' . $item . ',' ));
	}
}
?>